Improvement in scroll-saw mills



UNITED STATES PATENT, OErrCE JOHN RIGllARDS,` OF COLUMBUS, OHIO.

IMPROVEMENT IN SCROLL-SAW MILLS.

Spccficationforming part of Letters Patent No. 35,392, dated May 27, 1862.

a full, clear, and exact description of the same,

reference being had to the accompanying' drawings, forming part of this specification,

in Which-f Figure 1 is' a vertical transverse section of a scroll-saw mill arranged according to my improved plan.` Fig. 2 is a vertical longitudinal section of the same. Fig. 3 is a horizontal section of the main supporting-structure. Fig. 4 isa perspective view of the clamping device of the saw-stock. Fig. 5 is a horizontal section of the guard and guide and support of the upper part of the arrangement.

Similar letters of reference in the several fi gures indicate corresponding parts.

The nature of my invention under this patent consists in the arrangement and combinai tion of the solid supporting-structure, tubular saw-stock, and pitman, and the guard with supporting and guide plates, in the manner hereinafter described. a

With all arrangements of scroll-saws known to me the great trembling andvibrating sensation produced by the rapid speed to which the saw is necessarily driven is a very serious objection, it racking the saw-mill frame producing inaccuracy in the sawing, breaking or impairing the saw-blade, and disturbing the workmen, and also loosening the connections of the building in which the mill is operated. My invention to a very great degree obviates these objections.

To enable others skilled in the art to make and use my invention, I proceed now to describe the same with reference to the drawings.

A isa frame or support formed of a single, strong, upright pillar of metal or wood. It is made long enough to extend one ormore feet below the flooring of the building :and into theY ground, or be secured to a heavy timber or block planted in the ground or other rm place. This. pillar is bored through at asuitable point above theiooring or ground, and in the opening thus formed a through shaft,B, is tted, the extending ends of the shaft finding their bearing or supportin strong boxes,which are boltedto the pillar, as shown ata et, Fig. 1, the shaft having a 'driving-pulley, b, at one extremity and an eccentrc,c, at the other. Near the top of the pillar on the front portion a strong bracket,G, is bolted, said bracket having two arms th rough which vertical guide-boxes d d are formed, and

on top of the pillar the ordinary sawing-table, A', with -a passage for the play of the saw through it, is mounted and firmly bolted.

To the eccentric c a pitman-rod, D, is attached. This pitman-rod is made with a tubular stock, E,on its upper end,the stockbeing of sufficient diameter to allow the pitman-rod, although .it extends up into the stock a considerable distance, a chance to bend as it is drawn by the eccentric out of a vertical line, it bending within the tube. By this arrangement the stock answers as a part of the length of the pitman and yet does not render it necessary that the pitman should be made longer than usual because of the use of the stock. v

The saw-blade E is attached to the upper end of the stock or guide E, and the pitman is attached to the stock by means of a split pin, e, a tubular sockethead, j', a set-screw, g, a nut,h, and a screw-bolt, i, as shown. The socket-head fits in the top of the tubular stock, and is supported by means of a collar formed on itself. n its bottom a countersunk hole is cut. The screw-bolt iis inserted into the socket-head and screwed down into theiendof the pitrnanrod, having its hold in the screw-nut It, which is set down into a socket cut in the upper end of the pitman-rod. The head of,`v the screw-bolt finds its seat in the countersunk portion of the bottom of the socket-head. i The split pin e is inserted into the socket-head, and in its split the end ofthe saw is set and clamped by means of the set-screw g, which enters the side of the socket-head and binds against one side of the split pin e. The tubular stock is made with fiat sides, so that as it plays up and down in the guide-boxes d d,to which it is iitted, it shall not turn therein.

The upper end ofthe saw-blade is not attached to any device above the table,but is left disconnected,and.in place of upper connections a vertical stud, I, is extended down from the ceiling of the building to within a short distance of the top of the table. This stud has a deep groove cutinit from top to bottom. In this groove a strong strip, J, is tted to slide up and down, being held in position by means of a strong setscrew, K,which has a cla mp-nut, 75,011 one end, and isloosely passed through an oblong slotmi, of the strip J, bntrmly fastened in the stud I, as shown. At the lower end of the strip J hardcned steel guide and supporting plates n op are firmly attached by screw-bolts. These plates are ou the front of the lower end of the strip. Theplatenattachesflatwise to thestrip,and constitutes a back support to the back edge of the upper part of the saw. The strips o p attach to the face of the plate n on opposite sides of a eentral portion thereof, and constitute a vertical lateral guide for the upper portion of the sawblade. The strip J rests byits lowerend upon lumber which is being scrolled,and thus serves as aguard, and as it can be raised or lowered it will accommodate varying thicknesses of lnmber. rBhe upper end of the saw-blade passes up 'between the steel plates op and bears against u, and thus the stri p answers as a guard, a guide, and a"support, all of which functions it performs, whatever may be the adjustment imparted to it.

I do not claim under this patent the tubular stock, nor the combined guard, support, and guide, as I have applied for separate Letters Patent for the same; but

What I do claim as my invention, and desire to secure by Letters Patent, is-

1. The tubular saw-stock E and flexible pitman D, in combination with the guard,support, and guide J nop, substantially as and for the purpose described.

2. The tubular saw-stock E and exible pitman D,in combination with the guard,support, and guide J n op, arranged with the single solid structure A, and operating in the manner and for the purpose set forth.

Witness my hand and seal in the matter of my application for patent on improved scrollsaw mill this 14th day of April, A. D. 1862.

JNO. RICHARDS. [n s] IWitnesses:

GUs'rAvUs DIETERIOH, EDWIN S. Jnco. 

